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An Update On The Linux Power Situation In Ubuntu

10-07-2011, 01:40 PM

Phoronix: An Update On The Linux Power Situation In Ubuntu

While I was away for three weeks, there was an update on LP bug #760131, the infamous bug report on the power consumption being raised significantly higher in Ubuntu Natty. This bug report of high importance now indicates a fix being committed to Natty and a fix being released for Oneiric, but what has changed? Here is an update.

Comment

And given that any modern AMD or Intel motherboard is going to have a pci-e slot, this affects pretty much every hardware configuration out there, right?

So every netbook, laptop, and desktop out there is hit by this bug?

It depends more on the particular BIOS implementation. The standard is that ASPM capabilities are supposed to be declared in the various power management tables. However Windows interacts with the ASPM stuff by a different mechanism so there are a lot of BIOS's that don't bother implementing the standard. Linux works when the ASPM is declared via the standard method, but won't set the ASPM in the same manner that windows sets it (yet).